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Technician Licensing Class “T6”

Technician Licensing Class “T6”. Valid dates: July 1, 2010 – June 30, 2014. Amateur Radio Technician Class Element 2 Course Presentation. ELEMENT 2 SUB-ELEMENTS T1 - FCC Rules, descriptions and definitions for the amateur radio service, operator and station license responsibilities.

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Technician Licensing Class “T6”

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  1. Technician Licensing Class“T6” Valid dates: July 1, 2010 – June 30, 2014

  2. Amateur Radio Technician ClassElement 2 Course Presentation • ELEMENT 2 SUB-ELEMENTS • T1 - FCC Rules, descriptions and definitions for the amateur radio service, operator and station license responsibilities. • T2 – Operating Procedures • T3 – Radio wave characteristics, radio and electromagnetic properties, propagation modes • T4 – Amateur radio practices and station set up • T5 – Electrical principles, math for electronics, electronic principles, Ohm’s Law • T6 – Electrical components, semiconductors, circuit diagrams, component functions • T7 – Station equipment, common transmitter and receiver problems, antenna measurements and troubleshooting, basic repair and testing • T8 – Modulation modes, amateur satellite operation, operating activities, non-voice communications • T9 – Antennas, feedlines • T0 – AC power circuits, antenna installation, RF hazards

  3. T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteries • T6A1 A resistor is the electrical component used to oppose the flow of current in a DC circuit. • T6A2 The potentiometer is the type of component often used as an adjustable volume control. • T6A3 Resistance is the electrical parameter controlled by a potentiometer. Schematic Symbol Schematic Symbol

  4. T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteries T6A4 A capacitor is the electrical component that stores energy in an electric field. Various fixed capacitors Typical construction and schematic symbol for capacitors. 4

  5. T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteries T6A5 The capacitor is the type of electrical component consisting of two or more conductive surfaces separated by an insulator. Paper, mica, air… T6A6 An inductor is the type of electrical component that stores energy in a magnetic field. T6A7 The inductor is an electrical component usually composed of a coil of wire. Schematic Symbol 5

  6. T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteries T6A8 A switch is an electrical component that is used to connect or disconnect electrical circuits. T6A9 A fuse is an electrical component used to protect other circuit components from current overloads. Schematic Symbol Toggle Switch Slide Switch Rocker Switch Schematic Symbol Slow Blow Fuse Automobile Fuse 6

  7. T6A: Electrical components; fixed and variable resistors, capacitors, and inductors; fuses, switches, batteries T6A10 1.2 volts is the nominal voltage of a fully charged nickel-cadmium cell. T6A11 A carbon-zinc battery type is not rechargeable. Small and compact just like Ham Radio hand helds. Rubber duck antenna Ni-Cad rechargeable 1.25 volt batteries in a marine hand held. 7

  8. T6B:Semiconductors; basic principles of diodes and transistors • T6B1 Transistors are a class of electronic components capable of using a voltage or current signal to control current flow. • T6B2 A diode is an electronic component that allows current to flow in only one direction. • Rectification is process of changing AC to pulsating DC • Diode stops current flow when it tries to go in the reverse direction Rows of Transistors

  9. T6B:Semiconductors; basic principles of diodes and transistors • T6B3 A transistor is a component that can be used as an electronic switch or amplifier. • T6B4 The bipolar junction transistor is a component that is made of three layers of semiconductor material. Small Signal Transistors Schematic Symbol

  10. T6B:Semiconductors; basic principles of diodes and transistors T6B5The transistor is an electronic components that can amplify signals. T6B6 A semiconductor diode’s cathode lead is usually identified with a stripe. T6B7The abbreviation "LED" stands for Light Emitting Diode. 10

  11. T6B:Semiconductors; basic principles of diodes and transistors • T6B8The abbreviation "FET" stands for Field Effect Transistor. • T6B9 Anode and cathode are the names of the two electrodes of a diode. Zener Diode Semiconductor Diode

  12. T6B:Semiconductors; basic principles of diodes and transistors • T6B10 The bipolar transistor semiconductor component has an emitter electrode. • T6B11 The field effect transistor semiconductor component has a gate electrode. • T6B12 Gain is the term that describes a transistor's ability to amplify a signal. Gate Electrode Emitter Electrode

  13. T6C:Circuit diagrams; schematic symbols T6C1 Schematic symbols is the name for standardized representations of components in an electrical wiring diagram. 13

  14. T6C:Circuit diagrams; schematic symbols T6C2 Component 1 in figure T1 is a resistor. Resistor Figure T1 14

  15. T6C:Circuit diagrams; schematic symbols T6C3Component 2 in figure T1 is a transistor. Transistor Figure T1 15

  16. T6C:Circuit diagrams; schematic symbols T6C4 Component 3 in figure T1 is a lamp. Lamp Figure T1 16

  17. T6C:Circuit diagrams; schematic symbols T6C5 Component 4 in figure T1 is a battery. Battery Figure T1 17

  18. T6C:Circuit diagrams; schematic symbols T6C6 Component 6 in figure T2 is a capacitor. Figure T2 Capacitor 18

  19. T6C:Circuit diagrams; schematic symbols T6C7 Component 8 in figure T2 is a light emitting diode. Figure T2 Light Emitting Diode 19

  20. T6C:Circuit diagrams; schematic symbols T6C8 Component 9 in figure T2 is a variable resistor. Variable Resistor Figure T2 20

  21. T6C:Circuit diagrams; schematic symbols T6C9 Component 4 in figure T2 is a transformer. Figure T2 Transformer 21

  22. T6C:Circuit diagrams; schematic symbols T6C10 Component 3 in figure T3 is a variable inductor. Variable Inductor Figure T3 22

  23. T6C:Circuit diagrams; schematic symbols T6C11 Component 4 in figure T3 is an antenna. Antenna Figure T3 23

  24. T6C:Circuit diagrams; schematic symbols • T6C12The symbols on an electrical circuit schematic diagram represent electrical components. • T6C13The way electrical components are interconnected accurately represent electrical circuit schematic diagrams.

  25. T6D:Component functions T6D1 Rectifier devices or circuits change an alternating current into a varying direct current signal. Power supply contains: Transformer, rectifier (diodes), filter choke, capacitors, and regulators. This circuitry converts the house 120 VAC to varying DC and that is filtered and smoothed out to produce DC current that we need for our ham radio equipment. 25

  26. T6D: Component functions T6D2 A switch controlled by an electromagnet best describes a relay. Relays Electromagnets 26

  27. T6D: Component functions T6D3 A single-pole single-throw switch is represented by item 3 in figure T2. Single-Pole Single-Throw Switch Figure T2 27

  28. T6D: Component functions T6D4 A meter can be used to display signal strength on a numeric scale. S-Meter Icom 7700 28

  29. T6D:Component functions • T6D5 A regulator is a type of circuit that controls the amount of voltage from a power supply. • T6D6 A transformer is a component commonly used to change 120V AC house current to a lower AC voltage for other uses. • T6D7 An LED is commonly used as a visual indicator. Voltage Regulators Voltage Transformer An array of LEDs and resistors mounted on a printed circuit board

  30. T6D:Component functions T6D8 A capacitor is used together with an inductor to make a tuned circuit. T6D9 Integrated circuit is the name of a device that combines several semiconductors and other components into one package. Capacitor (variable) Inductor Tank Circuit or Tuned Circuit Tank Circuit Schematic Large-scale integrated circuit chip 30

  31. T6D:Component functions T6D10To control the flow of current is the function of component 2 in Figure T1. T6D11A common use of coaxial cable is to carry RF signals between a radio and antenna. Component 2 Figure T1 31

  32. Element 2 Technician Class Question PoolT6Electrical components, semiconductors, circuit diagrams, component functions[4 Exam Questions – 4 Groups] Valid July 1, 2010 Through June 30, 2014

  33. T6A01 What electrical component is used to oppose the flow of current in a DC circuit? • Inductor • Resistor • Voltmeter • Transformer

  34. T6A02 What type of component is often used as an adjustable volume control? • Fixed resistor • Power resistor • Potentiometer • Transformer

  35. T6A03 What electrical parameter is controlled by a potentiometer? • Inductance • Resistance • Capacitance • Field strength

  36. T6A04 What electrical component stores energy in an electric field? • Resistor • Capacitor • Inductor • Diode

  37. T6A05 What type of electrical component consists of two or more conductive surfaces separated by an insulator? • Resistor • Potentiometer • Oscillator • Capacitor

  38. T6A06 What type of electrical component stores energy in a magnetic field? • Resistor • Capacitor • Inductor • Diode

  39. T6A07 What electrical component is usually composed of a coil of wire? • Switch • Capacitor • Diode • Inductor

  40. T6A08 What electrical component is used to connect or disconnect electrical circuits? • Zener diode • Switch • Inductor • Variable resistor

  41. T6A09 What electrical component is used to protect other circuit components from current overloads? • Fuse • Capacitor • Shield • Inductor

  42. T6A10 What is the nominal voltage of a fully charged nickel-cadmium cell? • 1.0 volts • 1.2 volts • 1.5 volts • 2.2 volts

  43. T6A11 Which battery type is not rechargeable? • Nickel-cadmium • Carbon-zinc • Lead-acid • Lithium-ion

  44. T6B01 What class of electronic components is capable of using a voltage or current signal to control current flow? • Capacitors • Inductors • Resistors • Transistors

  45. T6B02 What electronic component allows current to flow in only one direction? • Resistor • Fuse • Diode • Driven element

  46. T6B03 Which of these components can be used as an electronic switch or amplifier? • Oscillator • Potentiometer • Transistor • Voltmeter

  47. T6B04 Which of these components is made of three layers of semiconductor material? • Alternator • Bipolar junction transistor • Triode • Pentagrid converter

  48. T6B05 Which of the following electronic components can amplify signals? • Transistor • Variable resistor • Electrolytic capacitor • Multi-cell battery

  49. T6B06 How is a semiconductor diode’s cathode lead usually identified? • With the word “cathode” • With a stripe • With the letter “C” • All of these choices are correct

  50. T6B07 What does the abbreviation "LED" stand for? • Low Emission Diode • Light Emitting Diode • Liquid Emission Detector • Long Echo Delay

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